Typewriting machine



Nov. 3, 1925. 1,559,677

. B. cORcoRf-N TYPEWRITING MACHINE FlelAJuly 21, 1923 Patented Nov. 3,

UNITED STATES PATENT OFFICE.

conNELIUs B. conconaN, nEcmsEn, LATE or NEW` Yonx, N. Y.; iaY MICHAEL' J. conconaN, or NEW You, N., Y., ADMINISTRATOR, AssIeNon To uNnEawoon TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF'DELAWAP TYPEWBITING' MACHINE.

Application llled July 21, 1923. Serial No. 853,041.

To all whom 'it may concern:

Be 1t known that CORNELIUS B.. ConCoRAN,

deceased, late a citizen of the United States,

and late residing in the borough of Bronx, county of Bronx, city and State of New York, invented certain new anduseful I mprovements in Typewriting Machines, of which the following is a specification.

This invention relates to sound-deadening devices for typewriting machines, and more particularly to a canopy that can be fastened to a machine so as to move transversely thereof, and to deaden the noises produced by the types and the carriage.

The body of the canopy is preferably oblong of a size sufficient to cover the carriage from end to end and from the rear to a point over the forward edge of the platen, and is so curved or bent in section from front to rear that its front edge is brought low enough to restl upon the end plates -of the carriage when the canopy is in closed position.

.The body of the canopy is properly composed of inner and outer shells constructed preferably of light sheet-metal, the inner shell being profusely perforated to permit the functioning of a pad or filler of any suitable. sound-deadening of absorbing material, such as felt, which is held between the shells.

The position of the canopy, when it is superimposed over the carriage, is such that it might interfere with the placing of work in the machine, and to relieve this condition suitable brackets, in which the canopy is pivotally hinged, are fastened to the end members of the carriage-frame, so that the canopy may be swung upwardly and backwardly to give free access to the carriage. The canopy brackets have suitable projections on their main body portions that act as stops to hold the canopy in an upright position when work is bemg placed in the machine, and to prevent it from swinging down against the rear of the machine. To further hold the canopy or cover away from the machine, and also to prevent movement or chattering when the canopy is down, screw members, which form the pivot at each rear corner of the canopy, are provided with spring washers which tend to check any undesired. movement of the canopy without detracting in any way from thc plvotal action of the joint.

'lo eliminate possible noise when the canopy is closed to begin typing, the' two forward corners are provided with bumpers, made of a suitable sound-deadening material, such as rubber, which arefastened in posltionl by means of ears or clamping members depending from and integral with the outer shell of the canopy. Other features and advantages will hereinafter appear.

In the accompanying drawings, Flgure is a side elevation of a typewriting machine that has been placed inside of a sound-deadening shoe, and shows the sound-deadening' cano y, described and clalmed herein, mounte on the carriageI of the machine.

Figure 2 is a side elevation of the sounddeadenlng canopy in raised position,` and shows the. method of fastening the canopv to the carriage. 1 Figure 3 is av plan view of the sounddeadening canopy mounted on a typewrit- 1ng machine, the carriage of which has been moved transversely to an extreme position at one side of the machine.

Figure 4 is a artial sectional rear view of the sound-dea ening canopy, showing in detail the construction of its rear edge and of the pivotal joint. V

Figure 5 is a detail perspective view of one of'the forward corners of the sound# deadenmg canopy, showing the method of fastenlng the bumpers i-n place thereon.

When a typewriting machine is being used in doing work, a large part of the ob- ]ectional noise produced is made by the typeheads striking against a platen 6, and by the shiftino' of a platen-frame 7 in a carriage 8 which 1s mounted to move transversely on a rail 9, which is supported by a bracket 10 which is part of a frame 11 of the machine. Some of this noise may be deadenedby enclosing the frame 11 of the machine vrin such vices built into it as an integral part thereof. Such sounddeade`nin g devices. or means,

however, will notwholly dampen the sound waves emanating upwardly and away from the machine, and especially those ysoundV waves set 1n motion by the striking ofthe platen 6, and the shifting of the platent'rame 7, which were referred to above. To effectively deaden these noises a sound-deadcning canopy 13 composed of an Iouter she-ll 1.-'1 and an inner closel perforated shell 15,) with'a pad ot" soundeadening material 16 `its ends -bent down to form ears 19. The

ears 19 are provided with tapped holes 20 to receive screws 21, which, by means of their construction, form a pivotal connection .be-l tween the canopy 13 and brackets 2:2. The brackets 22 arc fastened tothe ends of the carriage 8 in such a manner that. the canopy 18 will move transversely of the machine with the carriage 8 and so remain superimposed 'directly over it at. all times. The brackets 22 are provided with projecting stop portions 23 near their rear ends which provide. stops or rest-s to hold the canopy 13 in an upright position when it is raised to place workin the machine, and to prevent it from swinging down against the rear ot' the. machine; To further hold the canopy 13 in an upright position and also to prevent unintentional movement or chattering when it is closed, the screws 21 are provided with spring washers 24, which tend to tighten the joint between the canopy 13 and the brackets 22 without in any way detracting from the pivotall action of the connection.'

To prevent any possible noise being produced b v the front edge of the canopy 13 striking the end cover-plates of the carriage i 8, the front corners ot the canopy 13 are pr vided with bumpers 25 which have their projecting hub portions 26 clamped under depending clips 27 which arebent downward from the outer shell 14. of which they are an integral part.

The usual side gages Q8 for the work-sheet are slidable from left to right along a horizontal supporting rod 29, to which-they are usually hinged. This rod may be fixed or'l supported by its ends in the same brackets 22- which carry the canopy 13. i

Variations may be resorted to within the scope ot the invention, and portions 0f the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination with a platen and a carria e therefor, of a soun'd-deadening and soun -absorbing canopy placed over and above the-,carriage an platen, said canopy including a foraminous sheet placed 4next to the carriage and platen,and a sheet of-sound-ab- Lamers 'sorbing material extended over the, back of the j foraminous sheet, the latter designed and intended tp have` the sound waves propagated by the typewritin' machinev thereby andv strike thereon and be broken up the sheet osound-absorbing material absorb' any of said sounds that may reach it, whereby thesounds emanating from the typewritinn machine that reaclr the canopyv tion, and means to prevent n oise being emit ted when the forward edge of said sound deadening canopy comes incontact with the machine when said sound-deadenmg canopy Vis lowered into position.

3. In a typewriting machine, tion, a sound-deadenm shoe or other similar device in which tL-lne machine may be placed, a movable carriage, a sound-deadening canopy superimposed over said' movable carriage, means for pivotally attaching said sound-deadening canopy to said movable carriage to permit `moving said sound-deadening ycanopy and said ,movable carriage together transversely of the machine from one side to the other, means t0 hold said sounddeadening canopy in 'an' upright position when said sound-deadening canopy is raise-d to permit the placing of work in the machine, means to prevent any'unintentional movement or chattering of said sounddeadening canopy when in either a raised or lowered position, and means to prevent noise. being emitted when the forward edge of said sound-deadening canopy comes in -contact with said vmovable carriage when said sound-deadening canopy is lowered into position.

4. In a typewriting machine, in combina-I tion, a sound-deadening shoe or other similar device in which 'the machine -may be laced, a movable carria e, asound-deadening canopy superimpose. over said movable carriage, and means for pvotally connecting said sound-deadening canopy to said movable carriage to permit moving said sound-deadcning canopyl and said, movable carriage vtogether transversely of the machine from one side to the other.

5. In a typewriting machine having sounddeadening devices built into the frame thereof, in combination, a movable carriage, a sound-deadening canopy superimposed over in combinasaid movable carriage, means for pivotally attaching said sound-deadening canopy to said movable carriage to permit movingA said sonndfdeadening canopy and said movable carriage together transversely of the machine from one side tothe other, means to hold said sound-deadening canopy in an upright position when said sound-deadening canopy is raised to permit the placing of work in the machine, means to preventany unintentional movement or chattering of said sound-deadening canopy when in either a raised for lowered position, and means to prevent noise being emitted when the -forward edge of said sound-deadening canopy comes in contact. with said movable carriage when said sound-deadening` canopy is lowered into position. l A

6. In atypewriting machine, the combination of a platen, a carriage therefor, and a canopy mounted -on the carriage over the platen andv extending to the rear of the carriage, said canopy having a sound-absorbing pad on its under face and overhanging the ends of the carriage and absorbent of sound arising from the platen and carriage ends, and also from the rear of the carriage.-

7. In a typewritingmacliine, the combination of a platen, a carriage therefor, and a canopy over the platen and extending to the rear of the carriage, and there hinged to the carriage, to swing up and backfrom the platen, said canopy having a sound-absorbing pad on its under face.

8. In a typewriting machine, the combination of a platen, a carriage therefor, and a canopy mounted on the carriage over the platen and extending tothe rear of the carria e, said canopy having a sound-absorbing pa on its under face and overhanging the ends of the carriage and absorbent of sound arising from theplaten and carriage ends, and also from the rear of the carriage, said canopy hinged at its rear to-said carriage to swing back and off of the platen and car# riage. y *I 9. In a typewriting nachine, the combination of a platen, a carriage therefor, a canopy over the platen and extending yto the rear of the carriage, said canopy having a sound-absorbing pad on its under face and overhanging the ends of the carriage and absorbent of sound arising from the platen and carriage ends, and also from the rear of the carriage, supports extending rearwardlyfrom said carriage, and means hinging said canopy upon said supports, and affording a clearance spacein rear of the carf riage and in front of the hinge for the down- A ward passage of work-sheets. I

1Q. In a typewrltlng machine, the comblnation of a platen, a carriage therefor, 4a

canopy over the platen and extendingto they ing pad on its under face, and cushioningv means supporting said canopy at its frontV upon the ends of said carriage.

11. A sound-absorbing sheet forming part of a quieting device for type writers,pcom

prising two metal sheets and an intervening sheetwo'f sound-absorbing fabric, the inner of r said sheets being foraminated, .for the purpose specified.

12. Iny combination, a typewriting machine having a platen and a framework, a sound-subduing pack fastened upon said framework,'a canopy having a sound-subduing pad 'overhanging the platen and extending rearwardly of said pack, and means hinging said canopy at its rear end upon said machine ,to enable it to swing up and off from thefplaten.

13. In combination, a typewriting machine havinga platen and a framework, a sound-subduing pack fastened upon said framework, a canopy having a sound-subduing pad overhanging the platen and extending rearward y of said pack, and means hingingsaid canopy at its rear-end upon said machine to enable it to swing up 'and off from the platen, a passage being left between the platen and said hinge for a worksheet to hang back of said pack. A

14. The combination with the frame, carriage and platen of a typewriting machine, of sound-subduing means including a sounddeadening pack open at its top and fixed on the frame of the machine and havingside walls and -rear walls, all of said walls lined with sound-deadening material, and asounddeadening carriage-canopy lined with sounddeadening material and mounted on the carriage to travel therewith and largely covering the top opening of the pack and Vco-operative with the sound-deadening walls ofthe` l pack to form an air-pocket to confine, break up, deaden Vand absorb the sounds arising.`

from the operationof the machine; said canopy mounted for movement from over the platen, to give access vto the rpaper thereon.

' MICHAEL J. GORCORAN,

vA@imn/3traitor ofthe Estate of Uornelzus B.

Corcoran, Deceased.4 

